Tube ID - Page 5 - Videokarma.org TV - Video

Electronic M · #61 04-22-2020, 04:09 PM

Quote:

Originally Posted by timmy

Oh and tom, there seems to be 3 versions there are 2 214 that is listed they have different item numbers so I'm not sure but I guess start with the one that hopefully has the right tube.

There's only one version of Sam's folder 214-2 in my paper library....The monkey/intern/temp they had scanning the paper to PDF probably goofed and scanned it twice (especially given the item numbers for the pdf files are sequential).

Personally I'd check eBay for a cheaper original paper copy of Sam's 214-2 before I'd buy a mediocre scan or photo copy from Sam's website....the only reason I visit the Sam's site most times is to use the search function to tell me exactly where in my file cabinets I can find the schematic...

timmy · #62 04-22-2020, 04:20 PM

Yes I'm looking into eBay but your version you posted on page one shows the right tube but my set has a non polar cap that your 214 don't show so there may have been changes along the way. The problem I may have is there is no grid voltage to set the oscillator running but I have to wait to see if I get the 214 SAMs.

timmy · #63 04-23-2020, 07:12 AM

On a 5u4 rectifier tube the plate terminals are 4-6 this set had a 5u4 in it but numbers 3-5 have the ac so a 5u4 may only work on one side so is there another rectifier tube that uses 3-5 ? It may be the 5x4 since I don't have the right SAMs. Ok here's a weird update the transformer has output on 3-5 but the filiment source is 2-8 but the 5x4 the filiment is 7-8 so both these tubes won't work unless a jumper is put in place, so I don't know what's going on here I don't think there is another tube that would have 3-5 for the plate and 2-8 for the filiment.

bandersen · #64 04-23-2020, 09:19 AM

Are you sure you're not reading the tube the wrong way around ? 4-6 would look like 3-5 if you count around backwards.

timmy · #65 04-23-2020, 11:04 AM

Quote:

Originally Posted by bandersen

Are you sure you're not reading the tube the wrong way around ? 4-6 would look like 3-5 if you count around backwards.

Well yes you are correct I had the chassis on its side and I did count the pins backwards so that's good , but still cannot get the verticle running .

timmy · #66 04-23-2020, 02:11 PM

Hey tom, how much do you want for a copy or some sort of scan of the SAMs you have that has the 12bh7 tube not the 6u8.

Electronic M · #67 04-23-2020, 03:04 PM

Presently due to covid19 I'm not allowed to go to any public location with a good copier (my folks won't let me back in the house if I do that or anything similar). If I could do that like normal I'd change you the cost of the copy and postage.

The only scanner in the house is a 8x11 unit my folks own (and I have never used)...if you don't mind 17x11 sheets being fragmented into multiple 8x11 scans I can try that later...If I can scan it and find a way to get the files to you then you can have the scans gratis.

If my employer had only made work from home voluntary instead of mandatory like they did I'd try to scan it there...

timmy · #68 04-23-2020, 04:18 PM

Quote:

Originally Posted by Electronic M

Presently due to covid19 I'm not allowed to go to any public location with a good copier (my folks won't let me back in the house if I do that or anything similar). If I could do that like normal I'd change you the cost of the copy and postage.

The only scanner in the house is a 8x11 unit my folks own (and I have never used)...if you don't mind 17x11 sheets being fragmented into multiple 8x11 scans I can try that later...If I can scan it and find a way to get the files to you then you can have the scans gratis.

If my employer had only made work from home voluntary instead of mandatory like they did I'd try to scan it there...

oh hey tom anything at this point would be a huge help this set is driving me absolutely crazy, you can even email me with what ever you can do and again if there is a charge let me know. If you need the email just send me a pm and I'll give it to you. Thanks a lot. Tim. Ps I don't need the whole thing mostly just the main page and the cap or parts list that should be it.

Electronic M · #69 04-23-2020, 09:43 PM

Well my folks informed me their scanner does not work. I downloaded a scanner app for my smartphone and while it is not as good as using an actual hardware based scanner I think it is better than the pictures I have taken so far....my PM box is full so I can't send any. Click on my user name and select the 'send email to Electronic M' option and send me your email address and I'll email you back the PDF of the schematic and parts list.

timmy · #70 04-24-2020, 11:51 AM

Quote:

Originally Posted by Electronic M

Well my folks informed me their scanner does not work. I downloaded a scanner app for my smartphone and while it is not as good as using an actual hardware based scanner I think it is better than the pictures I have taken so far....my PM box is full so I can't send any. Click on my user name and select the 'send email to Electronic M' option and send me your email address and I'll email you back the PDF of the schematic and parts list.

Ok tom I sent the email address. Thanks again for your help.

Electronic M · #71 04-24-2020, 02:30 PM

No problem. You should have the file in your email.

timmy · #72 04-24-2020, 04:21 PM

Quote:

Originally Posted by Electronic M

No problem. You should have the file in your email.

Hey tom I got it thanks again, but amazingly that SAMs is different Like the one I have but your SAMs has the right tube and comparing to the chassis I have here is clearly different. Different values on resistors as well as voltage differences even the way things are wired. There is a cap or 2 in this set that is not on either SAMs .I had recapped this set one cap at a time so I know I didn't put a cap in the wrong place. So I guess there is more then 2 SAMs for this set so at this point I'm not sure where to go from here. There are several 470k resistors that are in the verticle measuring .540m and .539m so I don't think that is so bad but if there were changes maybe these resistors in a given circuit cannot tolerate a rise in value. These resistors in both SAMs show 100k , clearly different. And the chassis didn't look like it was ever touched.

timmy · #73 04-26-2020, 04:50 PM

Is there any chassis that had 2 or more SAMs for the same chassis ? I had gone over 2 SAMs for the same chassis and they are wired differently and it's frustrating to find the right one since it looks like there maybe 3 or 4 of the same folder number and one different. No wonder cbs Columbia never made it up there like RCA and others. This set has all the power supply caps ground to the chassis so how is it possible to get over 300 volts from a cap that is grounded to the chassis and the positive to the verticle height pot to the plate of the oscillator with only 15 volts, pot turned up, it's not possible. There is 300 volts befor a 470k resistor but after there is 15 volts and the resistor is good. These original caps were one cap with 3 caps inside or 4 inside , the multi caps, so I don't know if these caps had some sort of internal connection, I don't know how that could have been done. The oscillator plate needs over 100volts.

timmy · #74 04-28-2020, 03:53 PM

Well I finally got verticle running but I do have a horizontal line that is bigger now but I now have lines from top to bottom like retrace lines and still no pic so without the proper SAMs I'm taking a guess on certain things. Video output and horiz and vert sync next.

timmy · #75 05-01-2020, 04:01 PM

Any ideas where to go from here, I hope it's not the yoke, I'm sure you guys have seen a lot of this but I haven't, I'm lost, lol. I am wondering if the flyback may be responsible here since I checked the ohms on the flyback and compaired it with a flyback I got from early television museum and pins 2 and 8 on the new one reads like 3.2 ohms but on the fly in the set don't read anything. I don't know if the flyback would do this.